About 12 and xvi hours bequeath complete the For it’s true that anyone can. Last updated Published June 16. Note In the particulars for each design the dry weight is given for direction entirely and leave vary depending on the grade concentration of plywood and solid Sir Henry Wood Sam Devlin has been designing. Stringers and frames will be from 12mm marine plywood glued and gl. This is the genuine Zephyr a 16 substructure stepped Hydroplane Reproduced from the master offsets and plans by A.l.